期刊
NATURE
卷 461, 期 7264, 页码 627-628出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nature08437
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资金
- FWO-Vlaanderen (Belgium)
- Alexander von Humboldt foundation (Germany)
- FNRS (Belgium),
- CNRS (France)
- STFC [PP/D000890/1] Funding Source: UKRI
- Science and Technology Facilities Council [PP/D000890/1] Funding Source: researchfish
It was recently discovered that the mean dark matter surface density within one dark halo scale-length (the radius within which the volume density profile of dark matter remains approximately flat) is constant across a wide range of galaxies(1). This scaling relation holds for galaxies spanning a luminosity range of 14 magnitudes and the whole Hubble sequence(1-3). Here we report that the luminous matter surface density is also constant within one scale-length of the dark halo. This means that the gravitational acceleration generated by the luminous component in galaxies is always the same at this radius. Although the total luminous-to-dark matter ratio is not constant, within one halo scale-length it is constant. Our finding can be interpreted as a close correlation between the enclosed surface densities of luminous and dark matter in galaxies(4).
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